A5066441023- Zeolite Catalysis and Synthesis
- Advanced Chemical Physics Studies
- Analytical Chemistry and Chromatography
- Catalytic Processes in Materials Science
- Spectroscopy and Quantum Chemical Studies
- Protein purification and stability
- Catalysis and Oxidation Reactions
- Advanced Chemical Sensor Technologies
- Gas Sensing Nanomaterials and Sensors
- Advanced NMR Techniques and Applications
- X-ray Diffraction in Crystallography
- Radioactive element chemistry and processing
- Solid-state spectroscopy and crystallography
- Chemical Synthesis and Characterization
- Chromatography in Natural Products
- Metal-Organic Frameworks: Synthesis and Applications
- Field-Flow Fractionation Techniques
- Mesoporous Materials and Catalysis
- Nuclear Materials and Properties
- Inorganic Fluorides and Related Compounds
- Analytical Chemistry and Sensors
- Electrostatics and Colloid Interactions
- Microfluidic and Capillary Electrophoresis Applications
- Glass properties and applications
- Catalysts for Methane Reforming
Lomonosov Moscow State University
2015-2024
Frumkin Institute of Physical Chemistry and Electrochemistry
2011-2024
Moscow State University
2022
Perm Military Institute
2019
University of Louisville
2016-2017
Département de Chimie Moléculaire
2005-2016
Western Kentucky University
2012-2014
Russian Academy of Sciences
1996-2014
Moscow Polytechnic University
2014
Division of Chemistry
2005-2013
In this paper, we present a chemiresistive metal oxide (MOX) sensor for detection of hydrogen sulfide. Compared to the previous reports, overall performance was improved in multiple characteristics, including: sensitivity, selectivity, stability, activation time, response recovery and temperature. The superior attributed utilization hybrid SnO₂/TiO₂ oxides as interactive catalytic layers deposited using magnetron radio frequency (RF) sputtering technique. unique advantage RF fabrication is...
Chemiresistors were constructed using 3-D silica nanospring mats coated with a contiguous film of ZnO nanocrystals. an average nanocrystal radius <3 nm, or >20 found to exhibit relative change in conductance factor 50 upon exposure gas flow 20% O2 and 80% N2 ∼500 ppm toluene operational temperature 400 °C. Samples 15 nm be the most responsive 1000. The addition metal nanoparticles (average equal 2.4 nm) onto surface nanocrystals produced 1500. For optimum conditions (T = °C,...
Chemiresistors (conductometric sensor) were fabricated on the basis of novel nanomaterials--silica nanosprings ALD coated with ZnO. The effects high temperature and UV illumination electronic gas sensing properties chemiresistors are reported. For thermally activated chemiresistors, a discrimination mechanism was developed an integrated sensor-array for simultaneous real-time resistance scans built. sensor response tested using linear discriminant analysis (LDA). distinguished signatures...
A new catalytic oxidation cycle over binuclear Zn- and Ca-cation clusters in zeolites is proposed. Intermediate active appear due to trapping of dioxygen. CO considered as a model reaction cluster located an 8-membered (8R) ring. Geometries involved the vary depending on nature size cation. Reagents, transition states, products have been optimized at isolated level considering DFT functionals (B3LYP, B3P86, B3PW91) with 6-31G* or 6-311++G** basis sets. Moderate activation energies 23.0 35.7...
An application of spectral analysis to the transient response signals ALD-fabricated conductometric sensors (chemiresistors) upon exposure short vapor pulses is discussed. It based on representation a curve in frequency domain, followed by multi-dimensional Quadratic Discriminant Analysis (QDA) for analyte identification. Compared standard steady-state amplitude analysis, this technique does not depend short-term sensor drift, have limitations number extracted features and has strict...
Self-assembled monolayers (SAMs) of thiols L-cysteine, 6-mercaptohexanol, 4-mercaptobenzoic acid, DL-thioctic acid and 11-(1-pyrenyl)-1-undecathiol, which have been selected for their propensity to interact with vaporized explosives, attached from solution onto gold decorated ZnO-coated nanosprings. X-ray ultraviolet photoelectron spectroscopies (XPS UPS) used investigate the surface electronic structure SAMs coated On basis XPS analysis, it has determined that packing densities...
A novel approach to analysis of complex gaseous mixtures is presented. The based on the utilization a compact gas chromatograph in combination with an array highly integrated and selective metal oxide (MOX) sensors. Thanks implementation multisensory detector, device collects multiple chromatograms single run. sensors MEMS platform are very distinct their catalytic properties. Hence, time separation by chromatographic column complemented detector. Furthermore, can perform broad range...
Available cross section data of electron–molecule processes are scaled to simulate the behavior dielectric strength (DS) in SF6 and CF4 gases at level two-term approximation Boltzmann equation solution corresponding homogeneous electric field model. Then, DS mixtures is evaluated compared experimental data. The reasons synergism its “asymmetry” relative both components SF6/CF4 analyzed terms rate constant variations with respect their values for pure as well weighted constants all channels...
This article is devoted to a molecular dynamics simulation study of partial dislocation loop nucleation with respect its mechanism and rate, propagation process under high shear stress in aluminum-copper alloys. The mechanisms near Guinier-Preston (GP) zones various diameters concentrations have been analyzed. Dislocation rates plain GP Cu-zones 3.5, 7.5, 13.5 nm at calculated using the mean lifetime method temperatures range 100 700 K. It has found that depending on temperature applied...
O2 sorbed in NaA, NaCaA, and CaA exhibits induced infrared bands whose frequencies are differently shifted with respect to the gas phase frequency. In preceding article, we analyzed intensity of these bands. The shift depends on molecule−zeolite interaction, by variation latter normal coordinate molecule. We have calculated this determine adsorption sites zeolites. It was shown that main site NaA is front NaIII cation. oxygen molecule can take two orientations, parallel perpendicular, field...
Ortho-para separation coefficients for H2 and D2 are estimated small medium coverage of 4A 5A zeolites using the assumption that two types adsorption sites occur. Charge distribution zeolite ions is modelled by fitting theoretical to experimental band shifts physisorbed diatomic molecules hydrogen, deuterium nitrogen. Computed values ortho-para have been demonstrated agree reasonably well. The reasons discrepancy between higher discussed.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible adsorption of carbon monoxide on copper oxideA. V. LarinCite this: Langmuir 1987, 3, 318–319Publication Date (Print):May 1, 1987Publication History Published online1 May 2002Published inissue 1 1987https://pubs.acs.org/doi/10.1021/la00075a005https://doi.org/10.1021/la00075a005research-articleACS PublicationsRequest reuse permissionsArticle Views148Altmetric-Citations3LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum...
Abstract A new series of calcium oxide clusters Ca 2 O X ( = 1–4) at cationic positions mordenite (MOR) and faujasite (FAU) is studied via the isolated cluster approach. Active framework fragments are represented 8‐membered window (8R) in MOR, two 6R 4R windows (6R+4R) possessing one common SiOSi moiety FAU. Structural similarities between moieties considered up to 4. High oxidation possibilities n R) 3 systems demonstrated relative CO, whose over Ca‐exchanged zeolite forms well...
Two possible schemes of carbonate formation (with and without water participation) in cationic form zeolites are considered. Activation energy for the hydrogen NaX zeolite from carbon dioxide is calculated at DFT level with periodic boundary conditions, while problems modeling symmetric same discussed. The copper studied using binuclear CuOCu clusters CO2 where influence on barrier questions related to application also considered by comparison data obtained MP2 level. reactivity tested...